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Science Bowl Question

📅 NSB 2011 Set 4🎓 HS🔄 Round 10#️⃣ Question 20🌟 Bonus📝 Multiple Choice

Which of the following is NOT true regarding vertebrate muscle contractions?

W) Tropomyosin binds the calcium ions and exposes the myosin binding sites on actin filaments
X) The H zone and I band become shorter
Y) T Tubules spread action potentials into the muscle fiber
Z) The contraction is terminated when calcium ions are taken up by the sarcoplasmic reticulum
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